University of Strathclyde

Leland Stanford Junior University

British Telecommunications Public Limited Company

Brian Culshaw

Herbert J Shaw

Ralph A Bergh

Neil B Graham

Herve C Lefevre

Christopher Raymond Moran

Mohammed Shabeer

Walter Craig Michie

Deepak Gulabrai Uttamchandani

Ivan Andonovic

Anthony P Turner

Peter Thomas Gardiner

C Chapin Cutler

Apparatus for detecting aqueous environments

Apparatus for assessing a particular property in a medium

Optical signal processing method and apparatus using coupled channels

An optically-excited vibratile transducer (10) of microstructural form has a plurality of vibratile elements (11, 12) in stacked formation. End (10A) of the transducer (10) is connected via an optical fibre (13) to an optical device (14) for exciting and interrogating the stack. The other end (10B) of the stack is exposed to the influence of a plurality of variables, such as pressure and temperature, in a gaseous atmosphere. The elements (11, 12) are free to vibrate without mutual physical interference and are respectively decoupled from the influence of the variable. For example, element (11) is subjected to the influence of both pressure and temperature but vent (15) is provided adjacent element (12) to decouple the effect of pressure from element (12) leaving it subject only to the influence of temperature.

Optically excited vibratile transducer

A fiber optic interferometer provides Kerr effect compensation by intensity modulating counterpropagating waves of unequal intensity such that the average value of the square of the intensity is equal to a constant times the average value of the intensity squared, the constant preferably being equal to about two. The intensity modulation may be achieved by using a modulator in combination with a light source or by using a source in which plural frequencies combine to provide the modulation.

Interferometer with Kerr effect compensation

Growing community of inventors

Kilmacolm, United Kingdom

Brian Culshaw